Certain halophytes can tolerate high salinity by accumulating ions like and in their vacuoles. Which membrane transport protein is MOST directly involved in this process?
Plasma membrane -ATPase
Tonoplast antiporter
Plasma membrane channel
Tonoplast aquaporin
Related Questions
Soil is able to maintain a regular supply of minerals by the help of which of the following?
I. Slow vegetation
II. Activity of decomposers
III. Soil erosion
IV. Weathering of rocks
I and III only
II and IV only
I, II, and III only
I, III, and IV only
The Casparian strip in the root endodermis primarily aids in:
Preventing water loss from the root
Increasing surface area for absorption
Storing excess ions
Regulating the entry of water and minerals into the xylem
Essential ions are absorbed in different amounts by
Root hairs
Shoots
Phloem
None of these
In the final phase of mineral absorption, ions are taken up into the …… space of cells
outer
inner
middle
peripheral
Which of the following is an example of passive ion transport in plants?
Transport of nitrates into root cells using ATP
Movement of sodium ions out of guard cells
Diffusion of potassium ions into root hairs down a concentration gradient
Uptake of calcium ions into root cells against a concentration gradient
The entry and exit of ions to and from the symplast requires the expenditure of
Photosynthetic energy
Metabolic energy
Energy derived from ions
Zero amount of energy
Absorption of minerals takes place in the form of
Molecules
Compounds
Ions
Mixtures
For the uptake of ions in the first phase of absorption of minerals, the pathway followed is called
Active uptake
Passive uptake
Neutral
None of these
Which of these is NOT directly involved in the active uptake of ions by plant roots?
Root hairs
Casparian strip
Plasma membrane ATPase
Stomata
Which of the following statements are correct about mineral absorption in plants?
In the initial phase, ions are taken up into the outer space of cells, the apoplast. It is a passive process
In the final phase, ions are taken slowly into the inner space, the symplast of cells and it is an active process
Passive movement of the ions into the apoplast occurs through ion channels, transmembrane proteins, which acts as selective pores
All of the above
